Improvement in cores for casting stench-traps



I UNITED STATES PATENT QEEIQE.

MICHAEL GAFNEY, or NEWARK, NEW JERSEY.

IMPROVEMENT IN CORES FOR CASTING STENCH-TRAPS.

Specificationformiug part of Letters Patent No. 13?,133, dated March 25,1873.

proved Stench-Trap (lore, of which the fol lowing is a specification:

My invention consists of a core of three parts, constructed as will behereinafter described, for use in casting the cast-metal stench trapsheretofore, and on the 31st day of October, 1871, patented to me.

Figure 1 is a section of the fiask and one of the parts of the core, anda side elevation of the other two parts. Fig. 2 is a side elevation ofthe part of the core shown in section in Fig. 1, and Fig. 3 is a sectionof the aforesaid improved trap as it comes from the mold.

Similar letters of reference indicate correresponding parts.

A is a large cylindrical core-piece for forming the interior of theshell B, and the exterior of the pipe 0 below the top of the shell A,and D represents a part or half of the flask in which the cores are allplaced, and which forms the exterior of the whole of the trap. This saidpart A fills the flask completely at the end E, but it is recessed at Fto make room for the thickness of the shell B, and in the upper end is asocket, G, for forming the outside of the tube 0, and from the bottom ofthis socket a hole, H, extends through core A for the prolongation ofcore I, around which both the parts 0 c are cast. This core Iis extendedthrough core A to facilitatethe detaching of it after the casting bytapping the lower end with a hammer. K represents the core for thewaste-pipe L; it is suitably fitted at the inner end against the side ofthe core A, as shown, to correspond with the angle it makes with saidcore A.

These cores, in connection with a flask of two parts, D, form the saidtraps, with the lower end open, which is afterwards spun or otherwisecontracted nearly together by curving or drawing said end inward until asmall hole remains, which is closed with a metal plug, in case it isdesigned to have the trap so that access may be had to the interior; orifnot, the lower end may be wholly closed by contracting it as much aspossible, and then finishing with solder. These cores may of course beused with sand molds, but I prefer to use a metal mold or flask inconnection with them.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- The combination of the core-pieces A, I, and K, anda suitable flask or mold, D, substantially as specified.

MICHAEL GAFNEY. Witnesses:

GEo. W. MABEE, T. B. MosHER.

